Made of super-tough Tritan, with an attached loop-top cap that won\'t come loose. Dishwasher safe (top rack, but make sure it does not touch heating element).   Extremely durable Resistant to staining Resistant to retaining odors Recommended for \"extreme\" adventures Dishwasher Safe - Please make sure the cap does not touch the heating element Withstands temperatures from -40ºF to 212ºF This bottle is made from Eastman Tritan TM copolyester that is manufactured without Bisphenol A (BPA) Colours - Slate is a Blue colour, Gray is Gray